Synthesis of thin-multiwalled carbon nanotubes by Fe-Mo/ MgO catalyst using sol-gel method

Prashant Dubey; Sang Kyu Choi; Bawl Kim; 이철진

Synthesis of thin-multiwalled carbon nanotubes by Fe-Mo/ MgO catalyst using sol-gel method

Carbon Letters
Abbr : Carbon Lett.
2012, 13(2), pp.99-108
Publisher : Korean Carbon Society
Research Area : Natural Science > Natural Science General > Other Natural Sciences General

Prashant Dubey ¹, Sang Kyu Choi ², Bawl Kim ², 이철진 ³

¹University of Allahabad
²Korea University
³고려대학교

Accredited

ABSTRACT

The sol-gel technique has been studied to fabricate a homogeneous Fe-Mo/MgO catalyst. Ambient effects (air, Ar, and H2) on thermal decomposition of the citrate precursor have been systematically investigated to fabricate an Fe-Mo/MgO catalyst. Severe agglomeration of metal catalyst was observed under thermal decomposition of citrate precursor in air atmosphere. Ar/H2 atmosphere effectively restricted agglomeration of bimetallic catalyst and formation of highly-dispersed Fe-Mo/MgO catalyst with high specific surface-area due to the formation of Fe-Mo nanoclusters within MgO support. High-quality thin-multiwalled carbon nanotubes (t-MWCNTs) with uniform diameters were achieved on a large scale by catalytic decomposition of methane over Fe-Mo/MgO catalyst prepared under Ar-atmosphere. The produced t-MWCNTs had outer diameters in the range of 4-8 nm (average diameter ~6.6 nm) and wall numbers in the range of 4-7 graphenes. The as-synthesized t-MWCNTs showed product yields over 450% relative to the utilized Fe-Mo/MgO catalyst, and indicated a purity of about 85%.

KEYWORDS

thermal decomposition, citrate precursor, nanoclusters, thin-multiwalled carbon nanotubes

Citation status

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Total Citation Counts(KCI+WOS) (13) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

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Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 6.04